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51315-5689-Effects of Phosphonates in the Microbiological Activity of SRM and APB in Oil Fields

Picture for Effects of Phosphonates in the Microbiological Activity of SRM and APB in Oil Fields
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Product Number: 51315-5689-SG
ISBN: 5689 2015 CP
Author: Arcelia Sanchez
Publication Date: 2015
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Biocorrosion of metal pipelines and equipment in the oil and hydrocarbon industry is frequently linked to the presence of Sulfate Reducing Bacteria (SRB) and Acid Producing Bacteria (APB). Suggested mechanisms of SRB induced corrosion are an accumulation of corrosive metabolites like hydrogen sulfide cathodic depolarization etc. The APB produce organic acids as results of its metabolism. A biocide can be defined as a chemical agent that is capable of destroying living organisms Presently microbiological studies have been conducted in the field with experimental testing to assess the efficiency of a biocide with a base of phosphonate derivatives. These laboratory tests perform microbiological analysis of APB and SRB inoculation or taking a liquid sample directly from an oil field well. After incubation the colonies are counted per ml of sample (UCF). A positive APB and SRB sample was selected for inoculations tests in the presence and absence of biocide. The tests were performed at four concentrations (50 ppm 100 ppm 150 ppm and 200 ppm) of the sample liquid bactericidal at different times (0 10 20 40 60 80 100 and 120 minutes). High bactericidal efficiency values for the biocide were recorded exceeding the 96% efficiency from the 100 ppm concentration to reduce bacterial growth in the sample of APB. The bactericidal proved highly effective in inhibiting the growth of SRB with no registered value greater than 10 cfu / ml indicating greater than 90% efficiency. The mechanism is also discussed. The concentration of 100 ppm proved to not alter the physiochemical properties of the fluid transported in the pipeline and will not affect the acceptability of the fluid in oil and gas processes. The active principle of the biocided tested (phosphonates derivates) proved consistent over time preventing bacterial growth in the 9 timelines.
Biocorrosion of metal pipelines and equipment in the oil and hydrocarbon industry is frequently linked to the presence of Sulfate Reducing Bacteria (SRB) and Acid Producing Bacteria (APB). Suggested mechanisms of SRB induced corrosion are an accumulation of corrosive metabolites like hydrogen sulfide cathodic depolarization etc. The APB produce organic acids as results of its metabolism. A biocide can be defined as a chemical agent that is capable of destroying living organisms Presently microbiological studies have been conducted in the field with experimental testing to assess the efficiency of a biocide with a base of phosphonate derivatives. These laboratory tests perform microbiological analysis of APB and SRB inoculation or taking a liquid sample directly from an oil field well. After incubation the colonies are counted per ml of sample (UCF). A positive APB and SRB sample was selected for inoculations tests in the presence and absence of biocide. The tests were performed at four concentrations (50 ppm 100 ppm 150 ppm and 200 ppm) of the sample liquid bactericidal at different times (0 10 20 40 60 80 100 and 120 minutes). High bactericidal efficiency values for the biocide were recorded exceeding the 96% efficiency from the 100 ppm concentration to reduce bacterial growth in the sample of APB. The bactericidal proved highly effective in inhibiting the growth of SRB with no registered value greater than 10 cfu / ml indicating greater than 90% efficiency. The mechanism is also discussed. The concentration of 100 ppm proved to not alter the physiochemical properties of the fluid transported in the pipeline and will not affect the acceptability of the fluid in oil and gas processes. The active principle of the biocided tested (phosphonates derivates) proved consistent over time preventing bacterial growth in the 9 timelines.
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